[Adelina]

...Does Exit to Eden count as a Mainstream Movie? If so, then I favor the Lisa-Eliot hairbrush scene.
I also fancy the Animal House frat scene involving Kevin Bacon.
These sort of dig in and get at my inner Dominatrix.

I also just discovered this week a spanking reference in one of my favorite shows, Buffy the Vampire Slayer. All the main Scoobies have their memories wiped out by a spell, and the two British ones determine they must be father-son (far from the truth!). The 'son' is dissing the 'father's' 'trollop', to which the answer is the inevitable not-too-old-to-be-taken-over-my-knee.
Mmm, to hear that uttered by Mr. Giles, in that British accent of his, with those ruggedly handsome features....

er... is it warm in here?